Andrej Filipčič

Exploring the Ultra-High-Energy Universe: Highlights from the Pierre Auger Observatory

M. Roth, Adila Abdul Halim, P. Abreu, M. Aglietta et autres

The Pierre Auger Observatory is the world’s largest facility dedicated to studying ultra-high-energy cosmic rays (UHECRs). Located in Argentina, it spans 3,000 square kilometers and utilizes a hybrid detection system comprising over 1,600 Water-Cherenkov detectors and fluorescence telescopes. Since its inception in …

Scaler data from the Pierre Auger Observatory as a proxy of solar activity

C. Taricco, Adila Abdul Halim, P. Abreu, M. Aglietta et autres

Solar activity variations strongly impact the modulation of the flux of low-energy Galactic Cosmic Rays (GCRs) reaching the Earth. The secondary particles, which originate from the interaction of GCRs with the atmosphere, can be revealed by an array of ground detectors. We …

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Event reconstruction with the Radio detector of the Pierre Auger Observatory

Simon Strähnz, Adila Abdul Halim, P. Abreu, M. Aglietta et autres

The surface detector of the Pierre Auger Observatory has recently been upgraded with the addition of radio antennas, forming the radio detector (RD). This contribution outlines the standard methods for reconstructing extensive air showers using the RD, along with recent developments. The …

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Observation of the Shadows of the Moon and Sun Using the Pierre Auger Observatory at an Average Energy of $7\times10^{17}\,$eV

Katarína Simkova, Adila Abdul Halim, P. Abreu, M. Aglietta et autres

The interaction of cosmic rays with celestial bodies such as the Moon or the Sun produces a shadow in the arrival direction distribution of the cosmic rays reaching the Earth. Such deficits from an isotropic flux have been observed by astroparticle observatories …

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Results and plans to apply interferometry to air shower observations at the Pierre Auger Observatory

Pim van Dillen, Adila Abdul Halim, P. Abreu, M. Aglietta et autres

By analysing the radio emissions from air showers using interferometry, we can estimate their properties. In this contribution, we apply interferometry to reconstruct air-shower parameters based on measurements taken with the Auger Engineering Radio Array (AERA) at the Pierre Auger Observatory. This …

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A prototype station of the IceCube-Gen2 Surface Array at the Pierre Auger Observatory

Stef Verpoest, Benjamin Flaggs, Carmen Merx, M. Ackermann et autres

The detection of extensive air showers using radio antennas has evolved into a mature technique, complementing particle detector arrays by providing sensitivity to the longitudinal development of the showers and enabling an independent determination of the cosmic-ray energy. Both the Pierre Auger …

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Simultaneous observations of multiple ELVES and SPRITES at the Pierre Auger Observatory

R. Mussa, Adila Abdul Halim, P. Abreu, M. Aglietta et autres

Since 2014, the Pierre Auger Observatory has exploited a dedicated trigger and its very high time resolution to study ELVES and harvest record samples of multiple ELVES using the Fluorescence Detector (FD). In 2017, after extending the readout of trace lengths to …

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Update on testing of air-shower modelling using combined data of the Pierre Auger Observatory and phenomenological consequences

J. Vícha, Adila Abdul Halim, P. Abreu, M. Aglietta et autres

The combined data of Fluorescence and Surface Detectors of the Pierre Auger Observatory has recently provided the strongest constraints on the validity of predictions from current models of hadronic interactions. The unmodified predictions of these models on the depth of shower maximum …

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Study of solar activity with AERA at the Pierre Auger Observatory

Rogerio Menezes de Almeida, Adila Abdul Halim, P. Abreu, M. Aglietta et autres

Solar activity events release vast amounts of energy, including radio waves, X-rays, ultraviolet radiation, and energetic particles, which interact with the ionosphere of the Earth and can disrupt radio wave propagation, affecting radio communications. They can either enhance reflections, improving long-distance terrestrial …

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Measurement and Interpretation of UHECR Mass Composition at the Pierre Auger Observatory

Eric William Mayotte, Adila Abdul Halim, P. Abreu, M. Aglietta et autres

The Pierre Auger Observatory has driven the field of ultra-high-energy cosmic ray (UHECR) physics, producing several groundbreaking observations over the last 20 years. One of the most striking findings has been the complex evolution of UHECR mass composition, as revealed by detailed …

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Search for UHE neutrinos from GRBs with the Pierre Auger Observatory

Yago Lema-Capeans, Adila Abdul Halim, P. Abreu, M. Aglietta et autres

We report on the search for ultra-high-energy neutrinos from the prompt emission of gamma-ray bursts (GRBs) using Surface Detector (SD) data from Phase I of the Pierre Auger Observatory (2004–2021). A total of 570 GRBs occur within the most neutrino-sensitive field of …

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AugerPrime: Status and first results

David Richard Schmidt, Adila Abdul Halim, P. Abreu, Marco Aglietta et autres

With the knowledge and statistical precision derived from two decades of measurement, the Pierre Auger Observatory has significantly deepened our understanding of ultra-high-energy cosmic rays while unearthing an increasingly complex astrophysical landscape and exposing tensions with hadronic interaction models. The field now …

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